Examples of org.w3c.dom.traversal.TreeWalker.nextNode()

org.w3c.dom.traversal.TreeWalker.nextNode()
Moves the TreeWalker to the next visible node in document order relative to the current node, and returns the new node. If the current node has no next node, or if the search for nextNode attempts to step upward from the TreeWalker's root node, returns null , and retains the current node. @return The new node, or null if the current node has no next node in the TreeWalker's logical view.

        assertEquals("c", tw.nextNode().getLocalName());
        assertEquals("d", tw.nextNode().getLocalName());
        assertEquals("e", tw.nextNode().getLocalName());
        assertEquals("f", tw.nextNode().getLocalName());
        assertEquals("g", tw.nextNode().getLocalName());
        assertEquals("h", tw.nextNode().getLocalName());
        assertEquals("i", tw.nextNode().getLocalName());
        assertEquals(null, tw.nextNode());
    }


    public void testPreviousNode() throws Exception {

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        assertEquals("d", tw.nextNode().getLocalName());
        assertEquals("e", tw.nextNode().getLocalName());
        assertEquals("f", tw.nextNode().getLocalName());
        assertEquals("g", tw.nextNode().getLocalName());
        assertEquals("h", tw.nextNode().getLocalName());
        assertEquals("i", tw.nextNode().getLocalName());
        assertEquals(null, tw.nextNode());
    }


    public void testPreviousNode() throws Exception {
        TreeWalker tw = new TreeWalkerImpl(dom, NodeFilter.SHOW_ALL, null, false);

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        assertEquals("e", tw.nextNode().getLocalName());
        assertEquals("f", tw.nextNode().getLocalName());
        assertEquals("g", tw.nextNode().getLocalName());
        assertEquals("h", tw.nextNode().getLocalName());
        assertEquals("i", tw.nextNode().getLocalName());
        assertEquals(null, tw.nextNode());
    }


    public void testPreviousNode() throws Exception {
        TreeWalker tw = new TreeWalkerImpl(dom, NodeFilter.SHOW_ALL, null, false);
        tw.setCurrentNode(dom.getLastChild());

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        assertEquals(null, tw.previousNode());
        assertEquals("a", tw.getCurrentNode().getLocalName());


        tw.setCurrentNode(dom.getLastChild());
        assertEquals("i", tw.getCurrentNode().getLocalName());
        assertEquals(null, tw.nextNode());
        assertEquals("i", tw.getCurrentNode().getLocalName());


        try {
            tw.setCurrentNode(null);
            fail("Exception expected");

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    }


    public void testParentNode() throws Exception {
        TreeWalker tw = new TreeWalkerImpl(dom, NodeFilter.SHOW_ALL, null, false);
        // Go to F node
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        assertEquals("f", tw.getCurrentNode().getLocalName());

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    public void testParentNode() throws Exception {
        TreeWalker tw = new TreeWalkerImpl(dom, NodeFilter.SHOW_ALL, null, false);
        // Go to F node
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        assertEquals("f", tw.getCurrentNode().getLocalName());

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    public void testParentNode() throws Exception {
        TreeWalker tw = new TreeWalkerImpl(dom, NodeFilter.SHOW_ALL, null, false);
        // Go to F node
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        assertEquals("f", tw.getCurrentNode().getLocalName());


        assertEquals("d", tw.parentNode().getLocalName());

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        TreeWalker tw = new TreeWalkerImpl(dom, NodeFilter.SHOW_ALL, null, false);
        // Go to F node
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        assertEquals("f", tw.getCurrentNode().getLocalName());


        assertEquals("d", tw.parentNode().getLocalName());
        assertEquals("c", tw.parentNode().getLocalName());

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        // Go to F node
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        tw.nextNode();
        assertEquals("f", tw.getCurrentNode().getLocalName());


        assertEquals("d", tw.parentNode().getLocalName());
        assertEquals("c", tw.parentNode().getLocalName());
        assertEquals("a", tw.parentNode().getLocalName());

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                return FILTER_ACCEPT;
            }
        }, false);


        // To populate accepted we only need to walk the tree.
      while (treeWalker.nextNode() != null);


        final List<ItemProp> result = new ArrayList<ItemProp>();
        for(Node itemPropNode :  accepted) {
            final String itemProp = DomUtils.readAttribute(itemPropNode, ITEMPROP_ATTRIBUTE, null);
            final String[] propertyNames = itemProp.split(" ");

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